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[Bug 1480877] Re: Access points' "PropertiesChanged" dbus signals freeze UI on mobile devices

To: ubuntu-sdk-bugs@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1480877@xxxxxxxxxxxxxxxxxx>
Date: Mon, 15 Feb 2016 15:16:13 -0000
Reply-to: Bug 1480877 <1480877@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

This bug was fixed in the package qtbase-opensource-src - 5.5.1+dfsg-
13ubuntu2

---------------
qtbase-opensource-src (5.5.1+dfsg-13ubuntu2) xenial; urgency=medium

  * Forward-port networking fixes from 5.4 series:
    - net-bearer-nm-disconnect-ap-signals7.patch (LP: #1480877)
    - qnam-ubuntu-fix6.patch (LP: #1528886)
    - xenial would potentially now have fixes for (LP: #1506015)
      (LP: #1507769) (LP: #1533508)

 -- Timo Jyrinki <timo-jyrinki@xxxxxxxxxx>  Tue, 09 Feb 2016 08:19:43
+0000

** Changed in: qtbase-opensource-src (Ubuntu)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1480877

Title:
  Access points' "PropertiesChanged" dbus signals freeze UI on mobile
  devices

Status in Canonical System Image:
  Fix Released
Status in Unity 8:
  New
Status in dbus-cpp package in Ubuntu:
  Fix Released
Status in network-manager package in Ubuntu:
  Incomplete
Status in qtbase-opensource-src package in Ubuntu:
  Fix Released
Status in dbus-cpp package in Ubuntu RTM:
  Fix Released
Status in location-service package in Ubuntu RTM:
  Fix Released
Status in network-manager package in Ubuntu RTM:
  Incomplete
Status in qtbase-opensource-src package in Ubuntu RTM:
  Fix Released

Bug description:
  Krillin, rc-proposed, r83

  
  DESCRIPTION:
  I've been trying to track down the cause of the occasional UI freezes on my Krillin device, and I noticed that whenever the UI freezes for 2-4 seconds, I get a burst of "PropertiesChanged" signals in dbus-monitor

  Here's a log of what's shown in dbus-monitor:
  http://pastebin.ubuntu.com/11992322/

  I'd guess the problem is in the code that actually catches the signals
  and acts accordingly.

  HOW TO REPRODUCE: 
  1) Move to a place where many wifi hotspots are available
  2) Connect the device via USB and run "phablet-shell" and then "dbus-monitor"
  3) Use the device while keeping an eye on dbus-monitor output

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